title: Parasitic helminths in the digestive tract of six species of owls (Strigiformes) in Spain.
mesh_terms: D000818:Animals; D001715:Bird Diseases / Q000453:epidemiology* / Q000469:parasitology*; D006376:Helminths / Q000302:isolation & purification*; D007411:Intestinal Diseases, Parasitic / Q000453:epidemiology / Q000469:parasitology / Q000662:veterinary*; D015995:Prevalence; D011996:Records / Q000662:veterinary; D012189:Retrospective Studies; D013030:Spain / Q000453:epidemiology; D020305:Strigiformes